A decibel (dB) is a logarithmic unit that measures sound intensity. In HVAC, decibel ratings show how loud equipment is during operation. Lower dB values mean quieter systems, which improves comfort in homes and businesses.
/ˈdɛsɪbəl/
A decibel (dB) is a logarithmic unit that measures sound intensity. In HVAC, decibel ratings show how loud equipment is during operation. Lower dB values mean quieter systems, which improves comfort in homes and businesses.
What does a decibel rating tell me?
It tells you how loud an HVAC unit is; lower dB ratings mean quieter operation.
Source: The Cooling Company
Every 10 dB increase sounds about twice as loud.
A homeowner choosing a new AC compares decibel ratings to keep the outdoor unit quiet near bedrooms or patios.
Look for low‑dB units and ensure proper installation to avoid vibration noise.
“Look for low‑dB units and ensure proper installation to avoid vibration noise.”
The decibel is named after Alexander Graham Bell and originated in telecom measurements.
Is a 60 dB air conditioner loud?
It is moderate—about the level of normal conversation. Lower is better for quiet areas.
Can installation affect HVAC noise?
Yes. Poor mounting, loose panels, or duct issues can increase noise.
What is a quiet HVAC system rating?
Many quiet outdoor units are in the low‑50 dB range.
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